b) On January 11, 2017 Domtar Corporation (the Corporation) announced the
resignation of Domenic Pilla from the Corporations Board of Directors (the Board), effective immediately. Mr. Pilla served on the Board since 2014. Mr. Pilla requested to resign in order to be able to devote attention to
his new position as Chief Executive Officer of McKesson Canada.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned
hereunto duly authorized.